Subaru IMPREZA 2004 Service Manual page 726

ENGINE (DIAGNOSTICS)
11.Malfunction Indicator Light
A: PROCEDURE
1. Activation of malfunction indicator light. <Ref. to EN(H4SOw/oOBD)(diag)-30, ACTIVATION OF MALFUNCTION INDICA-
TOR LIGHT, Malfunction Indicator Light.>
2. Malfunction indicator light does not come on. <Ref. to EN(H4SOw/oOBD)(diag)-32, MALFUNCTION INDICATOR LIGHT
DOES NOT COME ON., Malfunction Indicator Light.>
3. Malfunction indicator light does not go off. <Ref. to EN(H4SOw/oOBD)(diag)-34, MALFUNCTION INDICATOR LIGHT DOES
NOT GO OFF., Malfunction Indicator Light.>
4. Malfunction indicator light does not blink at a cycle of 3 Hz. <Ref. to EN(H4SOw/oOBD)(diag)-35, MALFUNCTION INDICA-
TOR LIGHT DOES NOT BLINK AT A CYCLE OF 3 HZ., Malfunction Indicator Light.>
5. Malfunction indicator light remains blinking at a cycle of 3 Hz. <Ref. to EN(H4SOw/oOBD)(diag)-37, MALFUNCTION INDICA-
TOR LIGHT REMAINS BLINKING AT A CYCLE OF 3 HZ., Malfunction Indicator Light.>
B: ACTIVATION OF MALFUNCTION
INDICATOR LIGHT
1) When the ignition switch is turned to ON (engine
off), the malfunction indicator light in the combina-
tion meter illuminates.
NOTE:
If the malfunction indicator light does not illuminate,
perform diagnostics of the malfunction indicator
light circuit or the combination meter circuit. <Ref.
to IDI-11, Combination Meter Assembly.>
Malfunction Indicator Light
↓
↓
↓
↓
2) After starting the engine, the malfunction indica-
tor light goes out. If it does not, either the engine or
the emission control system is malfunctioning.
<Ref. to EN(H4SOw/oOBD)(diag)-2, PROCE-
DURE, Basic Diagnostic Procedure.>
EN-01543
EN(H4SOw/oOBD)(diag)-30
(A)
(1)
(2)
(B)
(1)
(2)
(3) (4)
(A) Malfunction indicator light when no trouble
(B) Malfunction indicator light when trouble occurs
(1) ON
(2) OFF
(3) Ignition switch ON
(4) Engine start
EN-01544